Block-sorting transformations with pseudo-distance technique for lossless compression of color-mapped images

B. Koc, Z. Arnavut
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引用次数: 4

Abstract

Color-mapped images are widely used in many applications, especially in WWW, and are usually compressed with Graphic Interchange Format (GIF) without any loss. In our recent work, we showed that further compression gains can be achieved for color-mapped images over GIF when a structured arithmetic coder is used along with the pseudo-distance metric, instead of a Huffman coder as suggested by others. In this work, we show that further compression gains are possible when block-sorting transformations are employed along with the pseudo-distance technique.
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基于伪距离技术的彩色映射图像无损压缩分块排序变换
彩色映射图像广泛应用于许多应用程序中,特别是在WWW中,并且通常使用图形交换格式(GIF)进行压缩而不会有任何损失。在我们最近的工作中,我们表明,当使用结构化算术编码器和伪距离度量一起使用时,而不是像其他人建议的那样使用霍夫曼编码器,可以进一步压缩GIF上的彩色映射图像。在这项工作中,我们表明,当块排序转换与伪距离技术一起使用时,进一步的压缩增益是可能的。
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